Heating system



jufiy 1 1.924.

P. C. C. FRIDERICHSEN HEATING SYSTEM 4 Sheets-Sheet 1 Filed July 26 A TTORNE/X,

July 1 1924. 1,499,976

P. c. c. FRIDERICHSEN HEATING SYSTEM Filed July 26 1922 4 Sheets-Sheet 2 fete? L761! TWrwhsEIw ATTORNEY.

Jufiy 1 1924, 1,499,979

P. C. C. FRIDERICHSEN HEATING SYSTEM ATTORNEY.

Fatenteol July 1, 192 1.

ZPETER C. G. FRIDERICHSEN, 0F INDEPENDENCE, MISSOURI.

- Application filed July 26,

To all whom it may concern Be it known that 1, PETER C. C. Fnmn RICHSEN, a subject of the King of Denmark, residing at Independence, in the county of Jackson and State of Missouri, have in vented certain new and useful Improvements in Heating Systems, of which the following is a specification.

This invention appertains to certain improvements in heating systems and apparatus therefor generally, and has for its principal object to provide for an apparatus for utilizing the waste heat in kilns for the heating up of buildings, drying rooms and the like.

Another object of the invention is to provide for a system and apparatus of the class mentioned, and one embodying an effective means for circulating the hot gases from the fire boxes of a kiln for the heating of a drier or the like, and also for circulating air drawn through the hot interior of the kiln after the drawing of the fires from the fire boxes thereof" for heating the drier in lieu of the hot gases, the heated air be ing further utilized for the heating of the building in which the drier is installed, or such other buildings, rooms or compartments as may be desired.

With the foregoing and other equally im portant objects in view, the invention resides in the certain novel and useful construction, arrangement and operation of parts as will be hereinafter more fully described, set forth in the appended claims,

and illustrated in the accompanying drawings, in which Figure 1 is a fragmentary plan view, partly in section, of a preferred embodiment of the invention as it appears when properly comiected to a. kiln,

Figure 2 is a fragmentary vertical longitudinal section taken on the line 2-2, of Fig. 1,

Figure 3 is a fragmentary section taken on the line 33 of Fig. 2, and,

Figure 4 is an enlarged vertical transverse section taken on the line 4-1 of Fig.2.

Referring to the drawings, wherein similar characters of reference designate corre sponding partsthroughout the several views thereof, the numeral 10 represents a conventional form of kiln, such, as is used in the firing oftile or other similar articles, from the fire boxes (not shown) of which HEATING SYSTEM.

1922. Serial No. 577,583.

are drawn the hot gases or products of combustion of the fuel therein through the kiln and around the product on the one hand, or, a supply of air which is heated by its contact with the hot articles in the kiln and in its passage through the hot fire 7 boxes, after the fires thereof have been ex tinguished on the other hand. The hot gases or air are drawn through a branch tunnel 11 and into a main tunnel 12 by means of an exhaust or suction fan 17, and are forced therefrom, the hot gases indirectly through a drying room or the like 14, and from thence to atmosphere, while the heated air will be drawn through the branch tunnel 11 and the main tunnel 12 from the kiln and will pass directly through the drying room 14: and from thence will be either discharged to atmosphere or subsequently utilized in heating the interior of the building in which the drier 14; is installed, or such other buildings, compartments or rooms as may be desired.

The main tunnel 12 may be connected to any number of branch tunnels 11, leading to kilns for the utilization of the hot gases or heated air therefrom, and in each instance these branch tunnels 11 will be provided with a control damper 15 for the regulation of the flow therethrough of .the hot gases from the kilns, and, in addition to such regulation thereof, may be further regulated by the varying of the speed of the exhaust or suction fan 17.

The outlet end of the main tunnel 12 is arranged to discharge into a vertically disposed collection chamber or passageway 16, arranged at one side of one end of the drying room 14, and the upper end of this chamber or passageway 16 connects in a lateral direction with the casing 13 of the exhaust or suction fan 17, into which the hot gases or air from the kiln 10 are drawn or sucked by the action of the fan element 17, This fan element 17 is driven in any suitable manner. From the fan casing 13, the hot gas or air is dischargedthrough a passageway 21 which connects at its lower end with a distributing tunnel 22 extending transversely under the adjacent or front end of the drying room 14, The hot gases from the distributing tunnel 22 pass up through a bank of vertically disposed metallic tubes 25, which communicate at their lower ends with the distributing tunnel 22. The bank of tubes 25extends transversely of one end of the drying room 14 and are supported upon transversely extending beams 23. The tubes 25, at their upper ends, discharge into a space 26, which is formed between the metallic roof 27 and the metallic ceiling 28 of the drying room 14. The bank of tubes extend the entire width of the drying room 14, whereby the hot gases will be uniformly distributed into the'space 26 at one end thereof and over the ceiling wall 28; Opening outwardly of the *roof 27 of the drying room 14 at the rear end of the space 26 and medially of the opposite sides thereof, is a stack 29 for the discharge of the hot gases directly into the atmosphere. The passage of the hot gases outwardly of the space 26 is controlled by a damper 3O preferably of. the louvre type, arranged to close the stack opening in the 'roofwhen desired. In case the heated air is drawn directly from the kiln after the kiln has been finished, and is still hot, the

damper 30 in the lower end of the stack 29 will "be closed to prevent a draft being created'through the space 26 and the tubes'25, when the air will be allowed to pass directly into the interior of the drying room 14 around the tubes 25 in a manner as will be hereafter more fully explained.

The drying room 14 is formed of oppositely disposed side and end walls 31, 31,

erably of heavy sheet metal and the outer or upper side of the roof 27 is covered with a heat insulating material 27, substantially as shown. The heat from the hot gases -passing through the metal tubes 25, and the space 26 above the ceiling 28, will be radiated from the latter within the interior of the drying room 14.

The radiation from the tubes 25 and the ceiling 28 is utilized for the purpose of heating cool fresh air, and such heated fresh air can be circulated through the drying room. 14 and passing between the tubes 25. The means for introducing cool fresh air into the drying room comprises a conduit 38 which is set in the front end wall 32 of the drier 14, and is extended transversely thereof for the purpose. This conduit 38 leads from a pressure fan 39 which is driven from a suitable source of power (not shown) by means of a belt 40 trained around a pulley 41 carried on the shaft of the fan proper,

and extends to and entirely across the front of thedrier 1'4, andmay,'if desired, be exin the event of the conduit 38 being extended for use in connection with more than one drier, a second damper 43, of a similar type, will be positioned within the same at points between each of the latter. The portion of the conduit 38 extending across the front end walls 32 of the drier '14, is projected inwardly of the latter directly in line with the space 26, so that the inner part of its bottom wall is disposed in the plane of the ceiling wall 28 as well as in line with the upper ends of the tubes 25. The tubes connect-into the ceiling 28 and there areno openings permitting air or gases passing into the space 26 except through the tubes 25. This inwardly projected portion ofthe bottom wall of the conduit 38 forms a space 44 between itself and the tubes 25, and is arranged to discharge cool air into the dryin room'14, and which passes between the tu es 25 and has its temperature reduced by the heat radiating from such tubes 25, as well as by the heat radiating from the ceiling 28. The discharge openings 45 are preferably provided with trap doors 46 which are normally closed, when the hot gases from the kiln 10 are being passed through the tubes 25 to the space 26 at the top of the drier 14, whereby, none of the gas will be permittedto pass directly into the interior of the drier below the ceiling wall 28. Any suitable means (not shown) will be provided for effecting the opening of the trap doors 46, when desired for the passage of the heated air directly to and through the drier 14. This'supply of hot air will be practically free from all trace of gases, and consequently can be passed directly through the drier in the manner desired for the same. I

A flow of the heated air through the drier 14 is maintained by the provision of a flue or space 46 extending transversely of the rear of the same, which space is arranged in communication with the interior of the drier sired, for the heating of a'building in which the drier is installed, or other buildings,

rooms or compartments, and for such purpose, the conduit 48 is extended to any desired point where it connects to a suitable number of small branch conduits 50 for distribution to such buildings, rooms or compartments to be heated, while a damper 51 is provided at the lower end of the stack 49 to prevent the escape of the heated air upwardly of the same. IVhen the heated air is not needed in the building, the latter designated generally as at 52, the dampers 51 and 53 are opened when the air will pass directly up the former to atmosphere. The suction fans 17 and 39 are preferably driven by variable speed motors (not shown), so as to make it possible to regulate the quantity of air and gases circulated through the use of the several control dampers of the system.

From the foregoing, it will be readily apparent that, while a preferred embodiment of the apparatus and system has been described and illustrated herein in specific terms and details of construction, arrangement and operation, various changes in and modifications of the same may be resorted to without departing from the spirit of the invention, or the scope of the claims appended hereto.

Having fully described the invention, what is claimed is 1. In a system of the class described, the combination with a kiln, of a drier located exteriorly of said kiln, a bank of vertically disposed metallic tubes arranged in said drier at one end thereof, and power operated means for drawing hot gases from the fire boxes of the kiln and passing the same indirectly through the drier by passage upwardly through said bank, said means being also operable for the drawing of air through the hot kiln and the fire boxes thereof after the drawing of the fire from the latter and passing the heated air directly through said drier.

2. In a system of the class described, the combination with a kiln, of a drier located exteriorly of said kiln, a bank of vertically disposed metallic tubes arranged within and at one end of said drier, power operated suction means for drawing hot gases from the fire boxes of the kiln and passing the same indirectly through the drier upwardly through said bank, said means being also operable for the drawing of air through the hot kiln and the fire boxes thereof after the drawing of the fire from the latter and passing the heated air directly through said drier, and means for introducing cold air directly to the interior of said drier and reducing the extreme high temperature of the hot air simultaneously with its flow into the latter.

3. In a system of the class described, the combination with a kiln, of-a drier located exteriorly of said kiln and having its interior formed to provide vertically and longitudinally disposed heat radiating means therein, power operated suction means for drawing hot gases from said kiln and passing the same to said drier and through the heat radiating means, said power operated suction means being also operable for the drawing of air through the hot interior of the kiln and the fire boxes thereof after the fires within the latter have been drawn and passing the heated air to and directly through the interior of the drier, and means for commingling the same with said heated air simultaneously with its flow through the latter.

4. In a system for the purpose set forth the combination with a kiln of a drier located exteriorly of the kiln and including a roof and a metallic ceiling spaced therefrom to provide a passage for heat, a bank of metallic tubes arranged at one end of said drier and terminating at said ceiling and disposed to establish communication between the bottom of the bank and said space, and

means for drawing a heating agent from the kiln and passing it up through said bank into said space, said bank and ceiling providing means for radiating heat 5, In a system for the purpose set forth the combination with a kiln of a drier located exteriorly of the kiln and including a roof and a metallic ceiling spaced therefrom to provide a passage for heat, a bank of metallic tubes arranged at one end of said drier and terminating at said ceiling and disposed to establish communication between the bottom of the bank and said space, means for drawing a heating agent from the kiln and passing it up through said bank into said space, said bank and ceiling providing means for radiating heat, and means for introducing cold air into the drier from the top of said bank.

In testimony whereof, I affix my signature hereto. 

